<template>
	<div class="login_container">
		<div class="login_box">
			<!-- 头像区域 -->
			<div class="avatar_box"><img src="~assets/logo.png" alt="" /></div>
			<!-- 登录区域 -->
			<el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
				<!-- 用户名 -->
				<el-form-item  prop="username"><el-input v-model="loginForm.username" prefix-icon="el-icon-user-solid"></el-input></el-form-item>
				<!-- 密码 -->
				<el-form-item prop="password"><el-input v-model="loginForm.password"  type="password" prefix-icon="el-icon-s-goods"></el-input></el-form-item>
				<!-- 登录按钮 -->
				<el-form-item class="btns">
					<el-button type="primary" @click="login">登录</el-button>
					<el-button type="info" @click="resetForm">重置</el-button>
				</el-form-item>
			</el-form>
		</div>
	</div>
</template>

<script>
export default {
	name: 'Login',
	data(){
		return {
			loginForm:{
				username:'admin',
				password:'123456'
			},
			//验证表单的验证规则对象
			loginFormRules:{
				//验证用户名是否合法
				username:[
					{ required: true, message: '请输入用户名', trigger: 'blur' },
					{ min: 2, max: 10, message: '长度在 2到 10 个字符', trigger: 'blur' }
				],
				//验证密码是否合法
				password:[
					{ required: true, message: '请输入登录密码', trigger: 'blur' },
					{ min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
				]
			}
		}
	},
	methods:{
		// 点击重置
		resetForm(){
			this.$refs.loginFormRef.resetFields();
		},
		//表单预验证
		login(){
			this.$refs.loginFormRef.validate(async valid => {
				// console.log(valid)
				if(!valid) return;
				const { data:res } =await this.$http.post('login',this.loginForm)
				if(res.meta.status !== 200) return this.$message.error("登录失败！用户名或密码错误，请重新输入")
				this.$message.success("登录成功！")
				//1.将登录成功之后的 token ，保存到客户端的 sessionStorage 中
				//	1.1项目中出了登录之外的其他API接口，必须在登录之后才能访问
				//	1.2 token 只应在当前网站打开期间生效，所以将 token 保存在sessionStorage中
				console.log(res)
				window.sessionStorage.setItem('token',res.data.token)
				//2.通过编程式导航跳转到后台主页，路由地址是 /home
				this.$router.push("/home")
			});
		}
	}
	
};
</script>

<style lang="less" scoped="scoped">
.login_container {
	background-color: #2b4b6b;
	height: 100%;
}
.login_box {
	width: 450px;
	height: 300px;
	background-color: #fff;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	border-radius: 8px;

	.avatar_box {
		height: 130px;
		width: 130px;
		border: 1px solid #eee;
		border-radius: 50%;
		padding: 10px;
		box-shadow: 0 0 10px #ddd;
		position: absolute;
		left: 50%;
		transform: translate(-50%, -50%);
		background-color: #fff;

		img {
			width: 100%;
			height: 100%;
			border-radius: 50%;
			background-color: #eee;
		}
	}
}

.login_form{
	position: absolute;
	bottom: 0;
	width: 100%;
	padding: 0 20px;
	box-sizing: border-box;
}
.btns{
	display: flex;
	justify-content: flex-end;
}

</style>
